I have a Salamander stand for all my components. It is totally variable on all 4 corners. I have added a Symposium Svelte Plus stand for my table. I have taken great care to insure my CA table is 100% level. On checking elsewhere with my level I find I am slightly outside the bubble on my Nak. Dragon tape deck and my Cambridge Audio 840 CD and 751 BD player. Salamander make solid , stable gear. I assume cassette decks are no worry (they were in cars for many years after all, and now CD players) for being 100% level so my question is primarily a CD/DVD issue. Is being slightly outside the bubble anything that will effect performance?